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System
Survey information
Hyper Dolphin
Deep Tow system
In the first year of the DONET project, the location of the observatory has been tentatively determined. Then the deep-sea survey and other fundamental examinations related to deployed sensors have been conducted by using JAMSTEC's research vessels and deep-sea vehicles. Natural events such as slumps, slides and turbidity currents on steep, sediment covered slopes, and earthquake events are potentially risks to the DONET in the deep-sea area in the lifetime. Both deep-sea survey and risk assessment are required in order to find better observatory's sites and safer submarine cable route. Sensors' installation tests have been also done since 2007. Their results could contribute to the actual sensors' development. We continue to carry out our surveys before deployment of DONET. Period Cruise No. Vessels Vehicles Operation Cruise summary Download in PDF
Finished Survey
| Period | Cruise No. | Vessels | Vehicles | Operation | Cruise summary |
|---|---|---|---|---|---|
| Dec,2006 | KY06-13 | Kaiyo | Deep Tow system | Route survey | |
| Apr,2007 | KY07-06 | Kaiyo | Deep Tow system | Bathymetry survey Route survey |
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| Jul,2007 | YK07-E02 | Yokosuka | Deep Tow system | Route clearance | |
| Aug,2007 | KY07-11 | Kaiyo | Deep Tow system | Bathymetry survey Route survey |
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| Nov,2007 | KR07-15 | Kairei | Kaiko 7000II | Benchmark installation | |
| Dec,2007 | NT07-20 | Natsushima | Hyper Dolphin | Seismic sensor test | |
| Feb,2008 | NT08-04 | Natsushima | Hyper Dolphin | Seismic sensor test | |
| Apr,2008 | KY08-03 | Kaiyo | Deep Tow system | Route survey Route clearance Benchmark installation |
Download |
| Sep,2008 | NT08-20 | Natsushima | Hyper Dolphin | Seismic sensor test | Download |
| Oct,2008 | KR08-12 | Kairei | Kaiko 7000II | Route survey | Download |
| Nov,2008 | NT08-23 | Natsushima | Hyper Dolphin | Seismic sonsor test | Download |